Releasable implement hook



Oct. 18, H N WRIGHT RELEASABLE` IMPLEMENT HOOK 2 Sheets-Sheet 1 Filed Feb. 1.1, 1946 INVENTOR. Hazzle'f N. Wrlg/z.

Y HTToRNEY.

Oct. 18, 1949.

H. N. wRlGH-r RELEASABLE IMPLEMENT HOOK Filed Feb. 11, 1946 2 Sheets-Sheet 2 INVEN'TOR. Hazele N. Wrigh.

ATTORNEY,

` between the tractor-and the load.

'Other objects; advantages and features of invention" may- 'appearfromy Y-the accompanying Patented Oct. 1 8, 1.949'

@UNITED 'STATES j RELEAs-BLE IMPLMENT 1100K y @1 Haz'elet 1N. wfilghmnglewooa, Calif. Appli'cati'nrebmary 11,1946, serial No. ,646,878

l '(Slaims.

This invention relates to "a "releasable" implem'ent hook which is'suitably attached to'a'vehicle, such asa tractor orthe' like,"andishitched to an implement or truck, yo'r the"1ike'," and theprime V obj ect of my inventionis to povide'an'vel' means v5 oi'releasin'g the load if the pullfthereonbecomes greater than the amount for whichthe implement hook is set. l

Avri'object of. my invention is' to 'providean'ovel releasable4 yinplenien-thook which '.can be quickly andweasily adjusted for varying loads.

Another hobject of my in ventionisl to provide a .novel'rleasable implement hookwhich can be variously' adjusted from a rigid or non-rel'easable hook to a' releasable device, as may be'desired. ai.,

A feature of my invention resides in the plurality of springs againstrijgll-hicljiy the load on the hook presses, these springs each being adjustable to Avar'y their tensions,

tripping the hook so that the load may be either releasedv or attached without requiringethatthe l user handle the-'hook or that he placeh-imself drawing, the subjoined detailed description and the appended claims.

In the drawing:

Figure 1 is an end view of my releasable implement hook.

Figure 2 is a side elevation of the same.

Figure 3 is a top plan view of the same.

Figure 4 is a side View of the hook.

Referring more particularly to the drawing, the numeral I indicates a draw bar, which is suitably attached at one end to the power vehicle, all of which is usual and well known. A ange 2 is either fixedly mounted on the draw bar I, or may be an integral part thereof. A hook frame 3 is formed with outwardly extending flanges 4, 5, these flanges resting on the ange 2. The hook frame 3 is formed with a recess 6, into which the upper end of the draw bar I extends, the purpose of this construction being to provide a bearing or support for the hook frame so that the frame will not tend to tilt or move relative to the draw bar I when a load is applied.

The hook frame 3 is provided with upstanding ears 'I and 8, and a recess 9 between them,` this recess providing a space into which the eye (not shown) on the implement can extend. A hook I is pivotally mounted between the ears 1 on the pin II, A notch I2 is formed on the lower end (Glil2803316) of'the-jkiook HLW-and they purpose of-this--notch'lwill be fur-ther described-.Y Av lock -bar I3 -ts in-:the wnotchf I 2 and-fmoveslr'elative tothehook I0 in a 'i --lrecess I'G;A said-recess extendinginto-the-recess 9. Foule boltsl l lrfiextenolA yupwardly throughL the ilwanges 2\-an`d- 4;- and-the-'head I 6 l'of-the-'bolts--bear against .the bottom ofatheflange 2;. Coilzfslrings 'll :'surnound .the lboltsk I 5*, and `:one-.endr ofethese zspringsbears. againsttheflangescd or` 5-,fand; the 1'() :othen ends against adjustingl nuts, I8; which-.screw onto the top of thenlbolts Iiil It `:will .be :evident i ethaathewtension of. the springs. Ifhcan rbervaried .bywmeans fon thezadjusting nuts'. I8., @When the I5 Ofy I'lhG Springs IfI the 1 springs will compressi-.that

is; theL -.flanges .4. and 5*.will tend tocmove away Strom' the .flange 2, thus compressing the springs.

LM Ateacheend of `the latch .bar I.3,1..there iszpro- Lwvid'edrapost I9, this -post extending downwardly =through theiianges 2, 4, 01;; 2land 5,.and further- .tumore Athepost is.slidablethroughzbothiotfthese l ila-nges. Hspring 20 surrounds` each of the posts IQand ther purpose of these springs -is .td- :yieldl-'+a .b1y`"press:the lock bar I3...z-into.the ,notch I2.

on-each-'side of uthefrdraw bar 1.1111 provide-a re- `"#leasing strap 2Ian`d 22.- flhese straps. are-.bent ''=-^'ioutwardly at 'their'.fupper-enias shown at :23, to

form an L-shaped structure. The posts I9 extend through thesse outward extensions 23, and a nut 24 is threaded onto each of the posts and bears against its respective strap 2l or 22, and by moving the nut 24 on the post, the position of the latch bar I3 can be adjusted in the notch I2.

A yoke 25 is `pivotally attached to the draw bar I and to each of the straps 2| and 22, and this yoke has a cable attached thereto which is manipulated by the operator of the moving vehiclethat is, by pulling on the cable, the yoke 25 is swung, which pulls the straps 2l and 22 downwardly, thereby pulling the post I=9 and latch bar I3 downwardly, and thereby releasing the hook II).

The hook I0 is automatically released under an excessive load in the following manner:

The latch bar I3 has a fixed position Within the notch I2, depending on how the posts I9 are adjusted longitudinally. Under an excessive pull, the springs I'l will compress. This causes the hook frame 3 to move away from the flange 2, and since the post I9 cannot move relative to the ange 2, the hook I0 will be (in substance) pulled away from the latch bar I3 until the latch bar moves out of the notch I2, and at this time the hook will rotate around the pin vII and the load will be released.

a hook frame mounted on said drawbar, ears on said hook frame, said ears having a recess between them, a hook pivotally mounted between said ears, said hook frame being movable longitudinally of said drawbar, a stationary flange on the drawbar, spring means pressing the hook frame against said flange, said hook having an elongated notch formed therein, a latch bar engageable with the notch in the hook, a post fixedly mounted on the latch bar, said post extending through the flange, a nut threaded on the post and bearing against the flange to adjust said post, and the bar, relative to the hook, a spring encircling the post and bearing against the latch bar to press said latch bar into the notch, and engaging the hook, a yoke pivotally mounted on the drawbar, a link extending from the yoke and connected to said post, said yoke being manually operable to pull the post and the latch bar out of engagement with the hook.

2. A releasable implement hook comprising a drawbar, a hook, a hook frame mounted on said drawbar, said hook being rotatably mounted in said frame, said hook frame being movable longitudinally of said drawbar, a stationary flange on the drawbar, spring means pressing the hook frame against said flange, said hook having a notch formed in the lower surface thereof, said hook frame having guide means located centrally thereof and extending longitudinally therein, a latch bar mounted to slide in said guide means and extending transversely of said hook and hook frame, said latch bar being located to enter Isaid notch and engage the hook, a post extending from and secured to the bar, said post extending through the flange, a spring surrounding the post and bearing against the latch bar and against a portion of said hook frame, said spring'pressing said latch bar into engagement with the hook, means to manually operate said latch bar, said means being connected at one end to said post and connected at its other end to said drawbar by a manually operated lever.

3. A releasable implement hook comprising a drawbar, a hook, a hook frame mounted on said drawbar, said hook being rotatably mounted in.

said frame, said hook frame being movable longitudinally of said drawbar, a stationary ange on said drawbar, spring means pressing the hook frame against said ange, said hook having a notch formed in the lower surface thereof, said 'hook frame having guide means located centrally thereof and extending longitudinally therein, a latch bar mounted to slide in said guide means and extending transversely of said hook and hook frame, a second guiding means located in the lower` portion of said hook frame to receive an end portion of said drawbar, said second guiding means extending longitudinally of said hook frame and arranged symmetrically in alignment with said first named guiding means, said latch bar being located to enter said notch and engage the hook, a post extending from and secured to said bar, said post extending through the ange, a spring surrounding the post and bearing against the latch bar and against a portion of said hook frame, said spring pressing said latch bar into engagement with the hook, means to operate said latch bar manually, said means being connected at one end to said post and connected at its other end to said drawbar by a manually operated lever.

HAZELET N. WRIGHT.

REFERENCES CITED The following references are of record in the file of this patent:

UNiTED STATES PATENTS 

